#example code, lecture 3

#find the square root of a perfect square
#x = 16
#ans = 0
##for debug
##while ans*ans < x:
#while ans*ans <= x:
#    ans = ans + 1
#print ans

#x = 1515361
#ans = 0
#if x >= 0:
#    while ans*ans < x:
#        ans = ans + 1
#        #print 'ans is', ans
#    if ans*ans != x:
#        print x, 'is not prefect square'
#    else:print ans
#else: print x, 'is a negative number'
#

#x = 10
#i = 1
#while i < x:
#    if x%i == 0:
#        print "divisor",i
#    i = i+1

#x = 10
#for i in range( 1, x ):
#    if x%i==0:
#        print 'divisor' , i

#x = 100
#divisors = ()
#for i in range( 1, x ):
#    if x%i == 0:
#        divisors = divisors + (i,)
#print divisors

#string also support selecting slicing
#s1 = 'abcdefg'
#s2 = 'hijklmn'

#print s1 + s2
#print s1
#print s1[ 0 ]
#print s2[ 3: ]
sumDigits = 0
for c in str(1952):
    sumDigits += int(c)
print sumDigits
